Valve.



'wvl'll TETE @im v, l stares HARRY G. FREEMAN, 0F ATLANTIC CTY, NEW'JERSEY, ASSIGNOR OF ONE-HALF TO WILLIAM H. BRTLETT, OF ATLANTIC CITY,NEXV JERSEY.

VALVE.

i gosses.

Application filed January 27, i918.

To all fzofmgm t may Concern.'

p lle it known that l., Hanny G. FREEMAN, a citizen ot' the llnitedStates, and a resident of Atlantic City, Atlantic county, New Jersey,have invented certain Improvements in Valves, otl which thefollowinfr'is a specification.

My invention relates to valves of the thermostatic type; and one objectoit my invention is to provide an improved valve for the vacuum side ot'radiators employed in low pressure steam heating systems; a furtherobject or" my invention being' to provide a ball valve, and to soarrange such valve that it will be lifted to its seat; such liftingbeing efi'ected by an expansion member which lengthens under heat. rThevalve is so arranged that it will drop away from such seat by gravitywhen the expansion member cools and contracts. These and other featuresof my invention are more fully described hereinafter, reference being`had to the accompanying drawings, in which:

Figure 1, is a sectional elevation of my improved 'alve, taken on theline i-, Fig. 2; Fig'. is a sectional plan view on the line H-ll, Fig.l; Fig. S, is a view similar to Fig. l, showing the valve seated, andFig. 4f, illustrates a modified arrangement within the scope of myinvention.

In the drawings. 'l represents the shell or casing' of a valve structureto be mounted on the vacuum side oi a radiator, said structure having aninlet for the passage ot steam or vapor from said radiator, and anoutlet 3 to the vacuum pump; the valve easing' being' provided with aclosed bonnet -iz which may extend some distance above the` valveeasing'.

v`Within the valve casing is a diaphragm to which is secured in'anysnitable manner a plug (3, having' a through opening or aperture T inaxial alinement with the bonnet l, and an aperture or through openingfo' at right angles to said opening 7. The plug; on its under sideadjacent the lower portion of the aperture. or through openingr 7 isground to iorm a seat 9 tor a valve l0; such valve being preferably inthe shape of a ball and being carried by a stein 1l ot" less diameterthan the opening l and which stein passes through the opening 7 of theplug' 6 and through a tubular expansion member 12 to which it isadjustably connect- Specication of Letters Patent.

atented Nov. ilta.

Serial No. 74,666.

ed by the nuts 13, 183; the latter serving as a loclt nut when the partsare adjusted.

The expansion tube may be made of a suitable n'iaterial; rubbeicomposition, or any material that will not be destroyed by the heatinvolved, and will expand and contract in the proper manner so as to'aise the valve 1() to its seat under 'the desired conditions; 'that isto say, when the heat of the steam lassing from the radiator rises abovethe desired temperature andicauses such expansion member to increase itslength.

To avoid danger oi deforming or buckling the valve stein l1, may place aspring` washer or similar member 'l5 between the plug 6 and theexpansion tube i2 so that excessive movement of the tube will berelieved bv such spring` washer. in lieu of placing the spring'washer'adjacent the plan', such spline' washer may be interposed betweenthe upper end of the valve stem and the nut lil.

To prevent the valve and valve stem dropping away and becoming displacedin the pipe leading' to the vacuum pump should it be necessary toeli'ect repairs or replace the expansion tube, l prelier to arrange inthe passage dii-eetl)v below the ball valve a cross bar lG. which may becast integral with the rest of the valve body or casing, or intros ducedin any suitable manner.

.fis illustrated in Fig. i of the drawings, the lcross opening oraperture l in the plug is in such position that a small amount oi waterof condensation will remain in the chamber ot the valve casing at alltimes. This is not objectionable, but in some insta lees it may beotherwise arranged, as lor instance by placing; the lower wall et theaperture S in the plug in substantially the saine plane as that ot' thediaphragm or wall Set the valve casing, as shown in Fig. el, so that allwater olf condensation may wash ont when the valve l() is open. Thewater ot condensation washing through the openings of the plug (i willkeep the valve and the seat for the latter clean so that the structurewill be in operative condition at all times.

l claim:

A thermostatie valve comprising a body having closed heating chamber anda wall or diaphragm with Valve seat, a valve adapted to engage said seattrom below,

stem carried by said valve and extending lil() through said seat and toapoint above the same, an expansion member on the stem above said seat,said member being contained within saidheating chamber, means providinga loose connection between said Astem and member whereby `the latter isfree to expand and contract under changes in temperature and seattheyalve when moving in one direction and to permit the valve to unseatwhen moving in the opposite direction, vand means contained within saidheat ing chamber between the val-ve seat and the lower end of theexpansion member adapted Y' to compensate for any excess movement of `5said expansion-member.

2. A thermostatie valve comprising a body having arvelosed heat-ingchamber and a wall or diaphragm provided with a valve seat on its underside,fa stem extending through said seat beyond the opposite sidethereof and having a valve to engage the seat from below,an expansionmember surrounding said stem and Contained within said heating chamberso as to be subject to Changes of 25 teiipera'ture therein, and a springmember between the lower end of the expansion member and the valve seatand contained within said heating ehan'ibelr, said spring adapted.toscoinpensate' for any excess movevment of the expansion member.

' 3. thermostatio valve comprising a body, and a closed bonnet extensionthereof said body having a wall or diaphragm with a plug mounted thereonhaving a" valve seat on its` underside, said plug being apertured in twodirections, a stein withiirthe bonnet of said body, and extendingthrough one of the apertures of the plug and having' a 'valve adapted toengage the seat of said plug from below, an expansion vmembersurrounding the valve stem above said-plug and contained within theclosed bonnet 'of said body,

lmeans providing a loose connection between said stein and expansionmember whereby the latter is tree to expand and contract under changesin temperature and to seat the valve when moving in one direction and to'permit the valve to unseat when moving in the opposite direction. l

4. A. tliermostatio valve comprising a body, and a closed bonnetextension thereof said body having a wall or diaphragm with a plugmounted thereon having a valve seat on its underside7 said plugbeing'apertured in two directions, a 'stem within the bonnet of saidbody and extending through one of lthe apertures of the plug and havinga'valve Vie adapted to engage the seat of said plug from below, anexpansion member surrounding `the valve" stem above said plug and oontained within the closed bonnet of said body,

means providing a loose connection between. said stem and expansionmember .whereby the latter' is `free-to expandand contract, underchanges in temperature and to seat the valve when moving in onedirection andto permitithe valve to unseat when moving 'in the oppositedirection, vand aoiled spring interposed between; the end oftheexpansion member and the adyaeentl surface of the plug adapted tocompensate forl any excess mo've-I mentJ of the expansion member.

y HARRY. G.- FREEMAN

